diff --git a/rhodecode/apps/repository/views/repo_pull_requests.py b/rhodecode/apps/repository/views/repo_pull_requests.py
index dfd8171c..2c88b165 100644
--- a/rhodecode/apps/repository/views/repo_pull_requests.py
+++ b/rhodecode/apps/repository/views/repo_pull_requests.py
@@ -1351,15 +1351,7 @@ class RepoPullRequestsView(RepoAppView, DataGridAppView):
             ai_user = User.get_ai_user()
             log.debug("Initiating code review for pull request id: %s", pull_request.pull_request_id)
 
-            reviewers_data = [
-                (
-                    ai_user.user_id,
-                    ["adds system ai user for review"],
-                    False,
-                    PullRequestReviewers.ROLE_REVIEWER,
-                    pull_request.reviewer_data
-                )
-            ]
+            reviewers_data = []
 
             if add_existing_users:
                 current_reviewers = PullRequestReviewers.get_pull_request_reviewers(
@@ -1376,6 +1368,16 @@ class RepoPullRequestsView(RepoAppView, DataGridAppView):
                         )
                     )
 
+            reviewers_data = [
+                (
+                    ai_user.user_id,
+                    ["adds system ai user for review"],
+                    False,
+                    PullRequestReviewers.ROLE_REVIEWER,
+                    pull_request.reviewer_data
+                )
+            ]
+
             PullRequestModel().update_reviewers(
                 pull_request, reviewers_data, self._rhodecode_db_user
             )